The extension is inspired by Ilya Frank's method of language learning.
The method differs from common parallel texts method used in many books in a way it injects translation directly into the original text. Injections are small (usually several words or sentence, with notes if necessary). This way you read sentence on foreign language first, then check you understand everything correctly by translation and learn new words and phrases in context.
The extension does its best to resemble the method using Google Translate.More Info -
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